Which element among the lanthandes has the smallest atomic radius?

Which element among the lanthandes has the smallest atomic radius?
  1. Cetium
  2. Lutetium
  3. Europium
  4. Gadolinium

Solution

Lutetium is the last element of lanthanides. Due to lanthanide contraction it has the smallest size. ^

Asked in: JEE-TOPICTESTS-CHEMISTRY

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